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Identification and characterization of a novel alkaline/neutral invertase,HbNIN2,the key enzyme responsible for sucrose catabolism in rubber-producing laticifers(latex vessels) of Hevea brasiliensis

Identification and characterization of a novel alkaline/neut...

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第十四届全国植物基因组学大会

作者： Chaorong Tang Shujin Liu Jixian Lan Binghui Zhou Yihua Zhou Yunxia Qin Xiaohu Xiao Jinaghua Yang Jiyan Qi Yongjun Fang Xiangyu Long Rubber Research Institute Chinese Academy of Tropical Agricultural Sciences College of Agronomy Hainan University National Center for Plant Gene Research Institute of Genetics and Developmental BiologyChinese Academy of Sciences

Alkaline/neutral invertases(A/N-Invs) have attracted more attention due to the increasing findings in their physiological significance,subcellular locations and enzymatic *** Hevea brasiliensis(rubber tree),an A/N-Inv is known for decades as the enzyme responsible for sucrose catabolism in latex(cytoplasm of the rubber-producing laticifers),a principal point of control of rubber productivity. However,neither the gene encoding this enzyme nor its molecular and biochemical properties is *** fill this knowledge gap,we cloned and characterized three

关键词： neutral/alkaline invertase laticifers gene expression purification enzymatic properties Hevea brasiliensis(rubber tree)

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Ethylene and jasmonate as stimulants of latex yield in rubber trees(Hevea brasiliensis):Molecular and physiological mechanisms.A systematic approximation review

Advanced Agrochem

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Advanced Agrochem 2024年第4期3卷 279-288页

作者： Nixon Florez-Velasco Vanessa Florez Ramos Stanislav Magnitskiy Helber Balaguera-López Sistema de Investigación Desarrollo Tecnologico e Innovación Complejo Tecnológico para la Gestión AgroempresarialServicio Nacional de AprendizajeAntioquiaColombia Departamento de Agronomía Facultad de Ciencias AgrariasUniversidad Nacional de ColombiaBogotáColombia

The rubber tree Hevea brasiliensis(*** *** Juss.)Müell Arg.]is an important source of latex for the production natural *** rubber is an important biopolymer used in various industries,but aspects related to hormonal regulation in biosynthesis are still unknown,which would allow optimizing its *** review the molecular and physiological mechanisms of increases latex regeneration and flow by the stimulation of rubber trees with exogenous applications of ethylene and *** found that the increase in latex regeneration by ethylene is due to the increase in gene level expression and enzymatic activity of key photosynthesis and glycolysis enzymes for the generation of precursors in the first phase of rubber *** flow is supported by up-regulated genes in sucrose metabolism such as invertases,induction of sucrose transporters(SUT),and aquaporins(PIP)to maintain flow and turgor pressure in ***,the increase in latex yield mediated by jasmonate may be due to the induction of laticifer differentiation in the long term and in the short term be mediated by the induction of small rubber particles(SRPP)as non-enzymatic cofactors in the production of *** information contributes to the knowledge of latex biosynthesis,which allows for a greater support for the exogenous application of jasmonates and ethylene to regulate its production.

关键词： Rubber tree Sucrose Tapping Ethephon laticifers Natural rubber Stimulation Plant secondary metabolites

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